JP3481262B2 - 光学読取りシステム - Google Patents

光学読取りシステム

Info

Publication number
JP3481262B2
JP3481262B2 JP20909992A JP20909992A JP3481262B2 JP 3481262 B2 JP3481262 B2 JP 3481262B2 JP 20909992 A JP20909992 A JP 20909992A JP 20909992 A JP20909992 A JP 20909992A JP 3481262 B2 JP3481262 B2 JP 3481262B2
Authority
JP
Japan
Prior art keywords
magnetic
layer
optically active
read head
waveguide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP20909992A
Other languages
English (en)
Japanese (ja)
Other versions
JPH06180883A (ja
Inventor
ジャン‐クロード、ルーロー
クリスティアン、マヨ
Original Assignee
タレス
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by タレス filed Critical タレス
Publication of JPH06180883A publication Critical patent/JPH06180883A/ja
Application granted granted Critical
Publication of JP3481262B2 publication Critical patent/JP3481262B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/12—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by optical means
    • G11B11/14—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by optical means with reproducing by magnetic means
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G11B11/10541—Heads for reproducing
    • G11B11/10543—Heads for reproducing using optical beam of radiation
    • G11B11/10547—Heads for reproducing using optical beam of radiation interacting with the magnetisation of an intermediate transfer element, e.g. magnetic film, included in the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate
    • G11B7/124—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate the integrated head arrangements including waveguides
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/13—Optical detectors therefor

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Integrated Circuits (AREA)
  • Optical Head (AREA)
JP20909992A 1991-08-09 1992-08-05 光学読取りシステム Expired - Fee Related JP3481262B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9110177A FR2680268A1 (fr) 1991-08-09 1991-08-09 Tete de lecture magneto-optique.
FR9110177 1991-08-09

Publications (2)

Publication Number Publication Date
JPH06180883A JPH06180883A (ja) 1994-06-28
JP3481262B2 true JP3481262B2 (ja) 2003-12-22

Family

ID=9416096

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20909992A Expired - Fee Related JP3481262B2 (ja) 1991-08-09 1992-08-05 光学読取りシステム

Country Status (6)

Country Link
US (1) US5392181A (un)
EP (2) EP0844604A3 (un)
JP (1) JP3481262B2 (un)
KR (1) KR100253716B1 (un)
DE (1) DE69227486T2 (un)
FR (1) FR2680268A1 (un)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2656723B1 (fr) * 1989-12-28 1995-07-21 Thomson Consumer Electronics Tete de lecture multipiste magneto-optique.
FR2701332B1 (fr) * 1993-02-09 1995-03-10 Thomson Csf Tête de lecture magnéto-optique et appareil de lecture d'enregistrements magnétiques multipistes.
CA2137062A1 (en) * 1993-12-08 1995-06-09 Takumi Shimamori Magneto-optical recording and reading-out method
US5946114A (en) * 1994-06-17 1999-08-31 Thomson-Csf Optical filtering device and application to a liquid crystal projector
FR2723243B1 (fr) * 1994-07-26 1996-09-06 Thomson Csf Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation
TW294810B (un) * 1994-09-23 1997-01-01 Philips Electronics Nv
US6288980B1 (en) * 1996-04-23 2001-09-11 Garnetec Ltd. Magneto-optical head for information reading
RU2115962C1 (ru) * 1996-04-23 1998-07-20 Гарнетек Лтд. Магнитно-оптическая головка для считывания информации
FR2750787B1 (fr) * 1996-07-05 1998-11-13 Thomson Csf Tete magnetique matricielle d'enregistrement/lecture et procede de realisation
US6775100B1 (en) * 1997-05-05 2004-08-10 Seagate Technology Llc Laser assisted track width definition and radial control with magnetic recording
DE19846878A1 (de) * 1998-10-13 2000-04-20 Thomson Brandt Gmbh Kopfanordnung zur Multispur-Aufzeichnung mit integrierter Bandführung
EP1061510B1 (en) * 1998-11-09 2006-01-11 Seiko Instruments Inc. Near-field optical head and production method thereof
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
FR2797514B3 (fr) * 1999-08-10 2001-10-12 Thomson Csf Dispositif de lecture magneto-optique pour bandes magnetiques multipistes
FR2797710B1 (fr) * 1999-08-20 2001-11-09 Thomson Csf Tete de lecture anti-abrasion
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique
US6716723B2 (en) * 2002-06-05 2004-04-06 Intel Corporation Wafer cutting using laser marking
EP2452290A4 (en) * 2009-07-09 2014-12-17 Bilcare Technologies Singapore Pte Ltd READER FOR IDENTIFYING A LABEL OR IDENTIFYING OBJECT, AND APPROPRIATE METHOD AND SYSTEM

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425023A (en) * 1980-01-31 1984-01-10 Canon Kabushiki Kaisha Beam spot scanning device
NL192546C (nl) * 1982-07-19 1997-09-02 Nippon Telegraph & Telephone Leeskop voor een met hoge dichtheid uitgevoerde magnetische registratie.
JPH0731834B2 (ja) * 1984-04-20 1995-04-10 日本電信電話株式会社 高密度磁気光学再生ヘツド
US4654837A (en) * 1985-09-06 1987-03-31 Datatape Incorporated Magneto-optic transducer with enhanced signal performance
JPH01118105A (ja) * 1987-10-30 1989-05-10 Brother Ind Ltd 薄膜光機能素子
SU1522281A1 (ru) * 1988-02-25 1989-11-15 Симферопольский государственный университет им.М.В.Фрунзе Устройство дл оптического воспроизведени информации с носител магнитной записи
JPH01271946A (ja) * 1988-04-22 1989-10-31 Sony Corp 磁気光再生ヘッド
FR2656723B1 (fr) * 1989-12-28 1995-07-21 Thomson Consumer Electronics Tete de lecture multipiste magneto-optique.

Also Published As

Publication number Publication date
DE69227486D1 (de) 1998-12-10
EP0527670B1 (fr) 1998-11-04
US5392181A (en) 1995-02-21
JPH06180883A (ja) 1994-06-28
EP0844604A2 (fr) 1998-05-27
KR100253716B1 (ko) 2000-05-01
FR2680268B1 (un) 1995-04-21
KR930004963A (ko) 1993-03-23
DE69227486T2 (de) 1999-04-15
FR2680268A1 (fr) 1993-02-12
EP0527670A1 (fr) 1993-02-17
EP0844604A3 (fr) 2000-12-06

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